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Pressure control valve, especially for high pressure diesel pumps of injection devices of motor vehicles

a technology of pressure control valve and high-pressure diesel pump, which is applied in the direction of lift valve, fuel injecting pump, liquid fuel feeder, etc., can solve the problems of increasing the cost of pressure control valve and complex control of solenoid, and achieves the effect of inexpensive manufacturing and controllable piezo driv

Inactive Publication Date: 2006-03-21
HYDRAULIK RING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention aims to create a pressure control valve that has a simple design, is inexpensive to manufacture, and easy to control. To achieve this, the valve uses a piezo drive as its tappet driver. This drive is simple and inexpensive to manufacture, and it can be controlled easily. Overall, the invention provides a cost-effective and efficient solution for controlling pressure."

Problems solved by technology

The solenoid drive is comprised of several components; this increases the cost of the pressure control valve.
Moreover, the control of the solenoid is complex.

Method used

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  • Pressure control valve, especially for high pressure diesel pumps of injection devices of motor vehicles
  • Pressure control valve, especially for high pressure diesel pumps of injection devices of motor vehicles

Examples

Experimental program
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Embodiment Construction

[0009]The pressure control valve illustrated in FIG. 1 in axial section is provided preferably for high-pressure diesel pumps. The high-pressure pump has a housing 1 which has a mounting chamber 2 for the pressure control valve 3. A pressure bore 4 as well as a tank bore 5 are connected to the mounting chamber 2. The two bores 4, 5 are separated from one another by a valve body 6 which in the embodiment is a valve ball. It is positioned in the closed position of the valve on a valve seat 7 provided on an insert 8 that rests sealingly against the wall 9 of the mounting chamber 2. A bore 10 opens centrally into the valve seat 7; it has a diameter that is smaller than that of the two bores 4, 5.

[0010]The valve body 6 is secured by a tappet 11 in its sealing or closing position. The tappet 11 is actuated by piezo drive 12. The tappet 11 is fixedly connected to the piezo elements. The piezo drive 12 is configured in a way known in the art and comprises a housing 13 which is mounted seal-...

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Abstract

A pressure control valve for a high-pressure diesel pump of an injection device of a motor vehicle has a valve body and a piezo drive with a tappet securing the valve body in a closed position. The valve body in the closed position closes off a bore, containing a medium under pressure, relative to a pressure-relief bore. The piezo drive has at least one piezo element connected to the tappet. The piezo drive is mounted in a pump housing of the high-pressure diesel pump. A screw element receives the piezo drive and is used to screw the piezo drive into the mounting chamber of the pump housing.

Description

BACKGROUND OF INVENTION[0001]1. Field of the Invention[0002]The invention relates to a pressure control valve, in particular, for high-pressure diesel pumps of injection devices in motor vehicles, comprising a valve body which is secured by a tappet of a drive in a closed position in which the valve body closes off a bore, containing a medium under pressure, relative to a pressure-relief bore.[0003]2. Description of the Related Art[0004]Pressure control valves have the task to open, when surpassing a predetermined pressure in the pressure line conducting the medium, a passage for a medium into a pressure-relief bore so that the excessive pressure can be relieved. The valve body is secured by the tappet in its mounted position which tappet is actuated by a drive in the form of a solenoid. The solenoid drive is comprised of several components; this increases the cost of the pressure control valve. Moreover, the control of the solenoid is complex.SUMMARY OF INVENTION[0005]It is an obje...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): F02M37/04F02M59/46F02M63/00F02M63/02F16K31/00
CPCF02M59/468F16K31/004F02M63/0225F02M63/00
Inventor TRZMIEL, ALFREDNEUHAUS, ROLFZAPF, FRIEDRICH
Owner HYDRAULIK RING